RFID SYSTEM
First Claim
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1. An RFID antenna assembly configured to be energized with a carrier signal, the RFID antenna assembly comprising:
- an inductive component including a loop antenna assembly, wherein the circumference of the loop antenna assembly is no more than 25% of the wavelength of the carrier signal; and
at least one capacitive component coupled to the inductive component.
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Abstract
A magnetic field focusing assembly includes a magnetic field generating device configured to generate a magnetic field, and a split ring resonator assembly configured to be magnetically coupled to the magnetic field generating device and configured to focus the magnetic field produced by the magnetic field generating device.
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Citations
37 Claims
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1. An RFID antenna assembly configured to be energized with a carrier signal, the RFID antenna assembly comprising:
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an inductive component including a loop antenna assembly, wherein the circumference of the loop antenna assembly is no more than 25% of the wavelength of the carrier signal; and at least one capacitive component coupled to the inductive component. - View Dependent Claims (2, 3, 4, 5)
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6. An RFID antenna assembly configured to be energized with a carrier signal, the RFID antenna assembly comprising:
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an inductive component including a multi-segment loop antenna assembly, wherein the multi-segment loop antenna assembly includes; at least a first antenna segment including at least a first phase shift element configured to reduce the phase shift of the carrier signal within the at least a first antenna segment, and at least a second antenna segment including at least a second phase shift element configured to reduce the phase shift of the carrier signal within the at least a second antenna segment, wherein the length of each antenna segment is no more than 25% of the wavelength of the carrier signal; and at least one matching component configured to adjust the impedance of the multi-segment loop antenna assembly; - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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14. A magnetic field focusing assembly comprising:
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a magnetic field generating device configured to generate a magnetic field; and a split ring resonator assembly configured to be magnetically coupled to the magnetic field generating device and configured to focus at least a portion of the magnetic field produced by the magnetic field generating device. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. An RFID antenna assembly configured to be energized with a carrier signal, the RFID antenna assembly comprising:
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an inductive component including a multi-segment loop antenna assembly, wherein the multi-segment loop antenna assembly includes; at least a first antenna segment including at least a first phase shift element configured to reduce the phase shift of the carrier signal within the at least a first antenna segment, and at least a second antenna segment including at least a second phase shift element configured to reduce the phase shift of the carrier signal within the at least a second antenna segment, at least one far field antenna assembly; wherein the length of each antenna segment is no more than 25% of the wavelength of the carrier signal; and at least one matching component configured to adjust the impedance of the multi-segment loop antenna assembly. - View Dependent Claims (34, 35, 36, 37)
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Specification